A beam of light consisting of two wavelength $6500 A^{\circ}$ and $5200 A^{\circ}$ is used to obtain interference fringes in a young's double slit exp. Then what is the distance from central maxima where the bright fringes due to both wavelength coincides? The distance between slits is 2 mm and distance between plane of slits and screen is 120 cm

Question

$(a)\;0.2\;cm \\ (b)\;0.156\;cm \\ (c)\;0.3\;cm \\ (d)\;0.9 \;cm $